Great Northern Railway Historical Society Blueprint Collection JSBP4468, Seattle, Washington, 1928. Great Northern Blueprint Number Sheet EET 6, Office Building. Longitudinal Section. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4469, Seattle, Washington, 1928. Great Northern Blueprint Number X19-327-2, Proposed Post Office Building. Map of Vicinity. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Post Office.

Great Northern Railway Historical Society Blueprint Collection JSBP4470, Seattle, Washington, 1929. Great Northern Building. Distribution Heating and Lighting Diagram. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4471, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 1, Office Building. Basement Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4472, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 3, Office Building. Second Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4473, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 4, Office Building. Third Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4474, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 7, Office Building. Union Street Elevation. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4475, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 8, Office Building. 4th Avenue and Alley Elevations. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4476, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 9, Office Building. Floor Plan Details. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.

Great Northern Railway Historical Society Blueprint Collection JSBP4477, Seattle, Washington, 1929. Great Northern Blueprint Number Sheet EET 2, Office Building. Ground Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Office Building.